﻿namespace io.gitee.springsongs
{
    internal class Program
    {
        static void Main()
        {
            int a = 10,b = 20;
            Console.WriteLine(a + b);
            Console.WriteLine(a - b);
            Console.WriteLine(a * b);
            Console.WriteLine(a / b);
            Console.WriteLine(a % b);
            Console.WriteLine(++a);
            Console.WriteLine(--b);
        }
    }
}